More unit type groups would be cool (especially for the very large Chinese and Muslim groups) but it generally comes down to a lot of research time for very little gameplay benefit, which is why we don't split unit groups very often.
This suggestion would indeed be a lot easier to accommodate if it included suggestions as to what units might be used (balance etc, is better left to us I think but there needs to be a good number of types at about the same intervals year-wise).
This suggestion would indeed be a lot easier to accommodate if it included suggestions as to what units might be used (balance etc, is better left to us I think but there needs to be a good number of types at about the same intervals year-wise).